Cook County Loftslag and Average Veður
Loftslag of Cook County: average temperatures, rainfall and seasons month by month.
Loftslag in Cook County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Mánuður | Avg high | Avg low | Rigningfall | Rating |
|---|---|---|---|---|
| janúar | -2° | -8° | 73 mm | ★★☆☆☆ |
| febrúar | 4° | -4° | 19 mm | ★★★☆☆ |
| mars | 11° | 1° | 103 mm | ★★★☆☆ |
| apríl | 15° | 6° | 113 mm | ★★★☆☆ |
| maí | 20° | 11° | 68 mm | ★★★★☆ |
| júní | 26° | 18° | 126 mm | ★★★★☆ |
| júlí | 28° | 20° | 127 mm | ★★★★☆ |
| ágúst | 27° | 19° | 116 mm | ★★★★☆ |
| september | 24° | 17° | 74 mm | ★★★★☆ |
| október | 18° | 10° | 79 mm | ★★★★☆ |
| nóvember | 10° | 3° | 68 mm | ★★★☆☆ |
| desember | 3° | -3° | 68 mm | ★★☆☆☆ |
Loftslag type: Heimsálfaal. Heimild: Open-Meteo archive (ERA5).
Recent extremes in Cook County
Háttest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Cook County compares með nearby places
Annual averages, and the difference against Cook County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Area Code 312 | 0 km | 11°C | about the same | 1034 mm |
| Chicago | 0 km | 11°C | about the same | 1034 mm |
| The Loop | 1 km | 11°C | about the same | 1034 mm |
| ZIP Code 60601 | 1 km | 11°C | about the same | 1034 mm |
| Wicker Park | 5 km | 11°C | about the same | 996 mm |
Best time til visit Cook County
Go in maí, júní, ágúst, september and október. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: janúar, febrúar and desember - expect the least comfortable mix of heat, cold or rain.
What this means for Cook County
Today is about average for október. The forecast high of 17°C is in line með the 18°C typical for this month.
Rigning is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in júní til ágúst.
The gap between the warmest and coldest month averages 29°C.
What til pack, what til skip
- sun.glasses, a brimmed hat and SPF 30+
- Layers - the daily swing is 18°C, so mornings feel nothing like afternoons
- If your dates are flexible, avoid janúar, febrúar and desember - historically the least comfortable months here.
Samantekt
Cook County is a county in Illinois. Cook County is a county in the United States. Íbúafjöldinn er um 5.1 million.
Núna er hitinn 13°C (55°F) in Cook County með clear. Hitinn finnst vera 10°C. Í dag er hitinn frá 7°C til 17°C. Líkur á úrkomu eru 0%. Sightseeing conditions score 9.1/10 - frábært — farðu núna.
Besti tíminn til að heimsækja Cook County is maí, júní, ágúst, september and október. Loftslagið er continental. janúar, febrúar and desember tend til be the least comfortable months. júlí is the warmest month með average highs near 28°C, while janúar is the coldest með lows near -8°C.
The closest major airport is O'Hare International Airport (ORD), about 25 km away. Nearby highlights include Indiana Dunes National Park, Starved Rock State Park and Lake Michigan.
Í einföldu máli. Today is about average for október. The forecast high of 17°C is in line með the 18°C typical for this month. The best window til be outside is roughly 3 PM til 6 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Cook County today at 10/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Cook County
| Tegund | County |
|---|---|
| State | Illinois |
| Land | Bandaríkin |
| Heimsálfa | Norður-Ameríka |
| Hnit | 41°52′41.2″N 87°37′47.3″W (41.8781, -87.6298) |
| Mannfjöldi | 5.100.000 |
| Staðartími | 12:44 AM (UTC-05:00) |
| Best months | maí, júní, ágúst, september and október |
| Loftslag | Heimsálfaal |
Veður map for Cook County
Animated model layers. Pick a layer til load it.
Animated layers by Vindury. For pin-level detail and nearby places, see the interactive map below.
Explore Cook County
Every topic we hold for this place, and the same topic for the places around it.
Loftslag for related places
Frequently asked questions
Where is Cook County?
Cook County is a county in Illinois. Its coordinates are 41.8781, -87.6298. It lies in Norður-Ameríka.
What is the weather like in Cook County núna?
It is currently 13°C (55°F) með clear. Raki is 70% and wind is 14 km/h.
When is the best time til visit Cook County?
maí, júní, ágúst, september and október offer the most comfortable conditions in Cook County, which has a continental climate. janúar, febrúar and desember are usually the hardest months for outdoor plans.
What time zone is Cook County in?
Cook County observes America/Chicago (UTC-05:00). The local time is 12:44 AM.
How many people live in Cook County?
Cook County has a population of approximately 5.1 million.
What is the nearest airport til Cook County?
The closest airports are O'Hare International Airport (ORD), 25 km away.
What are the top things til do in Cook County?
Popular options include Indiana Dunes National Park, Starved Rock State Park and Lake Michigan.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Spá and observations | Open-Meteo (ECMWF and national models). |
| Loftgæði and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Loftslag averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Veður Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated október 6, 2026 at 12:44 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
